Loss of Applications Manager from web site

Photoshop Elements 15 has been working on my iMac (OS 10.13.6) since 2017. Suddenly it fails to launch, with message, "Adobe Application Manager, required to run your product, is missing or damaged. Please download a new copy of Adobe Application Manager from http://www.adobe.com/go/applicationmanager"

This file seems to be unfindable on the Adobe web site and leads only to Adobe Creative Cloud. This, despite information stating that it will run PSE 15, seems only interested in later subscription versions that I need a new iMac to use.

What is going on and how do I get PSE 15 working?

John Hasselgren